Krakow! Krakow! Two direct hits!

C: Fearless Spaceman Spiff closes in on the fleeing Zargons! Once again our hero is about to teach vicious alien scum that virtue is it's own reward! He locks onto target!
S: Psst, Calvin! What was the capital of Poland until 1600?
C: Krakow.
S: Thanks.
C: Krakow! Krakow! Two direct hits!

That's pretty much the extent of my knowledge of Krakow, but I guess I'll learn more in a couple weeks!